<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    div{
      width: 100px;
      height: 100px;
      border: 1px solid red;
    }
    span{
      border: 1px solid blue;
      /*行内元素不能修改宽高*/
      width: 100px;
      height: 100px;
      /*把行内元素改成了块级元素或行内块元素都可以修改宽高*/
      display: inline-block;
    }
    img {
      width: 100px;
      height: 100px;
      display: none;/*隐藏元素*/
    }
    a{
      width: 132px;
      height: 40px;
      background-color: #0aa1ed;
      /*行内元素不能修改宽高*/
      display: block;
      text-align: center;
      line-height: 40px;
      font-size: 20px;
      text-decoration: none;
      color: white;
      /*圆角 值越大月圆*/
      border-radius: 3px;
    }
  </style>
</head>
<body>
<a href="">查看详情</a>

<img src="../b.jpg" alt="">
<img src="../b.jpg" alt="">
<img src="../b.jpg" alt="">
<div>div1</div>
<div>div2</div>
<div>div3</div>
<span>span1</span>
<span>span2</span>
<span>span3</span>
</body>
</html>